muffler time...
#21
If you guys want to reduce th "drone" to your straight piped exhaust then I have a little trick I learned.
The drone is simply a harmonic vibration in the exhaust pipe like a guitar string on a guitar. The larger or longer the pipe then the higher or lower the vibrations pitch. The Cummins seems to produce a drone on a stock straight piped exhaust at about 2000-2200 RPM. A muffler or resonator simply changes or removes the pitch of that vibration. Straight pipe exhaust drones because its long and straight with no variations to reduce any vibrations. So.....for a cheap and easy test, go down to the hardware store and get yourself 3 or 4 large hose clamps that will easily fit over your exhaust pipe and leave a little room for some other piece of metal. Then if you have a fence T post then great but if not, go buy a 5 to 7 foot long T post and remove the spade at the bottom. Then mount the T post to the exhaust pipe about where the muffler/resonator should be with the 3 or 4 hose clamps. I mounted mine to the top so its not visible. Then give it drive and I bet the drone is seriously reduced. You can also add more metal to the exhaust or a different kind of metal to see if it further changes the drone. I just chose a T post simply because it was laying on the side of my barn already and I was merely performing a "test" to see if it even worked. I just haven't found the time or need to do something fancier. This whole thing I just mentioned should cost no more than about $5 to $10 at the most. It wont change the noise of the exhaust outside the cab either. Just the level of the drone.
The drone is simply a harmonic vibration in the exhaust pipe like a guitar string on a guitar. The larger or longer the pipe then the higher or lower the vibrations pitch. The Cummins seems to produce a drone on a stock straight piped exhaust at about 2000-2200 RPM. A muffler or resonator simply changes or removes the pitch of that vibration. Straight pipe exhaust drones because its long and straight with no variations to reduce any vibrations. So.....for a cheap and easy test, go down to the hardware store and get yourself 3 or 4 large hose clamps that will easily fit over your exhaust pipe and leave a little room for some other piece of metal. Then if you have a fence T post then great but if not, go buy a 5 to 7 foot long T post and remove the spade at the bottom. Then mount the T post to the exhaust pipe about where the muffler/resonator should be with the 3 or 4 hose clamps. I mounted mine to the top so its not visible. Then give it drive and I bet the drone is seriously reduced. You can also add more metal to the exhaust or a different kind of metal to see if it further changes the drone. I just chose a T post simply because it was laying on the side of my barn already and I was merely performing a "test" to see if it even worked. I just haven't found the time or need to do something fancier. This whole thing I just mentioned should cost no more than about $5 to $10 at the most. It wont change the noise of the exhaust outside the cab either. Just the level of the drone.
Thread
Thread Starter
Forum
Replies
Last Post
doublehbar
24 Valve 2nd Gen Dodge Cummins 98.5-02
13
08-09-2015 12:35 AM
Diesel Bombers
Latest Automotive Industry News
0
07-20-2015 01:20 PM
1969olds
24 Valve 2nd Gen Dodge Cummins 98.5-02
9
04-18-2015 02:59 PM
Diesel Bombers
General Diesel Related
0
03-19-2015 08:10 AM
Diesel Bombers
Latest Automotive Industry News
0
11-11-2014 04:10 PM